In fact, Luke and Tony were well aware that they hadn't been talking about Werner at all, but about Tony's proposal to 'supervise' superhumans.
After being taught a lesson by the little witch last time, Tony had somehow come up with a proposal for supervision, which included a plan to record and manage all superhumans (and combatants with similar abilities).
The two of them rarely clashed, but they had argued several times over this proposal.
In the end, nobody was convinced. They each had their own reservations, and the proposal was postponed.
Of course, the tycoon still tried to sound out the attitudes of the Avengers and the Bat Squad.
Then… nothing.
There were still a few people in the Avengers who supported him, but the Bat Squad laughed when they heard the proposal, and even cut off communication.
